EP 0904732 B1 20040512 - X-Ray computed tomography method and apparatus
Title (en)
X-Ray computed tomography method and apparatus
Title (de)
Verfahren und Gerät zur Röntgen-Computertomographie
Title (fr)
Méthode et appareil de tomographie à rayons X assisté par ordinateur
Publication
Application
Priority
JP 26622097 A 19970930
Abstract (en)
[origin: EP0904732A1] In order for image data pixel value ranges for several slices to be contained within the same preferred range, an x-ray computed tomography method and apparatus comprises an x-ray source (2) for emitting x-rays toward a subject, an x-ray detector (3) for detecting subject transmission information of the emitted x-rays and control means (15) for controlling the x-ray emission and detection, wherein the control means exerts the control so as to, prior to the tomographic imaging of the subject, produce scout images by fixing the angular position of the x-ray source at two different angular positions and performing the scout imaging of the subject respectively at the angular positions; calculates a scanning condition with reference to the standard deviation of image data based on the area of projection display data, a desired standard deviation of the image data and the pixel value attenuation ratio between the scout images acquired respectively at the two angular positions of the x-ray source; and exerts the control so as to perform the tomographic imaging according to the scanning condition. <IMAGE>
IPC 1-7
IPC 8 full level
A61B 6/03 (2006.01)
CPC (source: EP KR US)
A61B 6/032 (2013.01 - EP US); A61B 6/488 (2013.01 - EP US); G01N 23/00 (2013.01 - KR); Y10S 378/901 (2013.01 - EP US)
Designated contracting state (EPC)
DE ES FR GB IT NL
DOCDB simple family (publication)
EP 0904732 A1 19990331; EP 0904732 B1 20040512; DE 69823763 D1 20040617; DE 69823763 T2 20050421; JP 3244458 B2 20020107; JP H11104121 A 19990420; KR 100609248 B1 20061024; KR 19990030333 A 19990426; TW 450799 B 20010821; US 6067341 A 20000523
DOCDB simple family (application)
EP 98307973 A 19980930; DE 69823763 T 19980930; JP 26622097 A 19970930; KR 19980041921 A 19980930; TW 87116016 A 19980925; US 15803298 A 19980922